${}^{89}Y$ NMR study of the exchange coupling constant between the ${CuO}_{2}$ layer and the Gd ion in ${Gd}_{x}$ $Y_{1 - x}$ ${Ba}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$

1 May 1990

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 41 (13) , 9513-9515
https://doi.org/10.1103/physrevb.41.9513

Abstract

Free-induction decays of

{}^{89}Y

NMR are observed in magnetically dilute alloys

{Gd}_{x}

Y_{1 - x}

{Ba}_{2}

{Cu}_{3}

O_{7 - δ}

for x=0, 0.005, and 0.01. It is shown that the excess decay by Gd is almost completely due to its direct dipolar interactions. From an analysis of the indirect Ruderman-Kittel-Kasuya-Yosida interaction, the exchange coupling constant is estimated to be less than 0.01 eV.

Keywords

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Y89NMR study of the exchange coupling constant between theCuO2layer and the Gd ion inGdxY1−xBa2Cu3O7−δ

Abstract

Keywords

${}^{89}Y$ NMR study of the exchange coupling constant between the ${CuO}_{2}$ layer and the Gd ion in ${Gd}_{x}$ $Y_{1 - x}$ ${Ba}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$